/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.servicecomb.springboot.starter.configuration;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;

import org.apache.commons.configuration.AbstractConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.EnvironmentConfiguration;
import org.apache.commons.configuration.SystemConfiguration;
import org.springframework.boot.actuate.endpoint.AbstractEndpoint;

import com.netflix.config.ConcurrentCompositeConfiguration;
import com.netflix.config.ConfigurationManager;

/**
 *
 */
public class CseEndpoint extends AbstractEndpoint<Map<String, Object>> {

  public CseEndpoint() {
    super("archaius");
  }

  @Override
  public Map<String, Object> invoke() {
    Map<String, Object> map = new LinkedHashMap<String, Object>();
    AbstractConfiguration config = ConfigurationManager.getConfigInstance();
    if (config instanceof ConcurrentCompositeConfiguration) {
      ConcurrentCompositeConfiguration composite = (ConcurrentCompositeConfiguration) config;
      for (Configuration item : composite.getConfigurations()) {
        append(map, item);
      }
    } else {
      append(map, config);
    }
    return map;
  }

  private void append(Map<String, Object> map, Configuration config) {
    if (config instanceof ConfigurableEnvironmentConfiguration) {
      return;
    }
    if (config instanceof SystemConfiguration) {
      return;
    }
    if (config instanceof EnvironmentConfiguration) {
      return;
    }
    for (Iterator<String> iter = config.getKeys(); iter.hasNext();) {
      String key = iter.next();
      map.put(key, config.getProperty(key));
    }
  }
}
